CN102141453B - Power detection method of engine of construction machinery and device thereof - Google Patents
Power detection method of engine of construction machinery and device thereof Download PDFInfo
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- CN102141453B CN102141453B CN2010106077916A CN201010607791A CN102141453B CN 102141453 B CN102141453 B CN 102141453B CN 2010106077916 A CN2010106077916 A CN 2010106077916A CN 201010607791 A CN201010607791 A CN 201010607791A CN 102141453 B CN102141453 B CN 102141453B
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Abstract
The invention discloses a power detection method of an engine of construction machinery and a device thereof. In the device, a connecting shaft is connected with a power output mechanism of the engine and a power input shaft of a driven mechanism, both ends of a connecting shell are respectively connected with a flywheel shell of the engine and a shell of the driven mechanism, a coupling is provided with a torque induction device, a torque signal transmission primary coil and a power receiving secondary coil, the connecting shell is provided with a power transportation primary coil, a secondary coil used for acquiring a torque signal and a junction box which comprises a power conversion circuit, a torque signal modulation circuit and an external port, the torque signal transmission primary coil is in electromagnetic coupling with a torque signal receiving secondary coil, and the power transportation primary coil is in electromagnetic coupling with the power receiving secondary coil. The power detection device of the engine of the construction machinery has the advantages that the structure is simple and compact, and implementation and maintenance are easy.
Description
Technical field
The present invention relates to a kind of engineering machinery engine dynamic detection method and device thereof.
Technical background
Measuring engineering machinery engine output, to receive moment of torsion with hydraulic pump be very necessary, especially along with to the improving constantly of the various monitoring requirements of engineering machinery, and this measurement and the monitoring necessity more that becomes.For the hybrid power engineering machinery of energy-saving and emission-reduction, for the dynamic absorption that realizes the unnecessary power of engine with when engine power is not enough, be able to timely power and replenish, it is essential that this measurement and monitoring have just become for now.
But because the engine nacelle arrangement space of engineering machinery is narrow and small; Reasons such as common torque detecting apparatus installing space is big, complex structure, installation and maintenance inconvenience, for the power of existing engineering machinery engine detect with monitoring technology mainly be that hydraulic fluid flow rate and pressure through the indirect detection hydraulic pump converses the method that the mode of engine output is measured indirectly through calculating again.
In the prior art owing to need carry out conversion Calculation through the hydraulic fluid pressure and the flow of hydraulic pump output; And the efficient that the hydraulic oil of hydraulic pump output exists temperature and viscosity change and hydraulic pump to change makes conversion result and actual result error greatly, can not truly reflect the actual power that engine output and hydraulic pump receive.Have and directly to measure the defective low, can only be used for general power trend analysis usually, can not be used for engine and hydraulic pump are carried out control of load accurate quantification and monitoring with measuring accuracy.
For this reason; 03121677.3 patent shows a kind of hydraulic oil pump that has torque sensor, but because its torque sensor is arranged in the housing of hydraulic oil pump, makes the complex structure of hydraulic pump; Cost increases, and also makes the maintenance and the maintenance difficult of hydraulic pump and torque sensor simultaneously.And, because, adopted magnetically elastic torque sensor, if like this magnetic shielding not the good general cause the hydraulic pump parts to be magnetized and abrasive dust in the easy suction oil, cause hydraulic pump parts wear fault.Thereby the existing hydraulic oil pump that has torque sensor has the defective of complex structure, cost height, poor reliability, maintenance and repair difficulty, in practical application, is difficult to apply.
Summary of the invention
Technical matters to be solved by this invention is to propose a kind of engineering machinery engine dynamic detection method and device thereof, and this project mechanical engine power pick-up unit has advantage simple in structure, compact, easy to implement and that be easy to safeguard.
Technical solution of the present invention is following:
A kind of engineering machinery engine dynamic detection method is through the power input shaft of coupling spindle connection engine power output mechanism and follower; The two ends of coupling housing join with the housing of flywheel shell of engine and follower respectively; On shaft coupling, be provided with the Torque sensor unit, electric energy required on the shaft coupling transmits with the mutual inductance mode through the coil that branch is located on shaft coupling and the coupling housing; On coupling housing, be provided with the terminal box that comprises power supply access and signal output interface, power-switching circuit and signal modulation circuit; The torque signal that the Torque sensor unit obtains is transferred in the treating apparatus that is provided with on the coupling housing through coil mutual inductance mode, thereby realizes that moment of torsion detects.
The Torque sensor unit is the torque sensor based on line of tension, foil gauge, electric capacity, inductance, resistance, magnetoelasticity or magnetic resistance; Described follower is hydraulic pump, transmission for vehicle or torque converter.
Through the rotating speed of photoelectricity speed detector measurement engineering machinery engine, the gear ring of said photoelectricity speed detector and sensor are located at respectively on above-mentioned coupling spindle and the coupling housing.
A kind of engineering machinery engine power pick-up unit, coupling spindle connects the power input shaft of engine power output mechanism and follower; The two ends of coupling housing join with flywheel shell of engine and follower housing respectively; On coupling spindle, be provided with the Torque sensor unit, coupling spindle is provided with torque signal transmission primary coil and power supply receives secondary coil; On coupling housing, be provided with the power delivery primary coil, be used to obtain the secondary coil of torque signal and comprise the power supply access and the terminal box of signal output interface, power-switching circuit and signal modulation circuit; Torque signal transmission primary coil and torque signal receive secondary coil and carry out EM coupling; Power delivery primary coil and power supply receive secondary coil and carry out EM coupling.
Described engineering machinery engine power pick-up unit also comprises a photoelectricity speed detector, and the gear ring of said photoelectricity speed detector and sensor are located at respectively on above-mentioned coupling spindle and the coupling housing.
Terminal box is installed on the coupling housing, and said power supply access and signal output interface adopt any one among CAN bus, serial ports, LIN bus or the USB.
The Torque sensor unit is the torque sensor based on foil gauge, electric capacity, inductance, piezoelectricity, magnetoelasticity or magnetic resistance, and described follower is hydraulic pump, transmission for vehicle or torque converter.
Described moment of torsion induction installation is for adopting strain bridge as the sensitive element of measuring moment of torsion.
The power induction out-secondary is connected to rectification circuit and filtering circuit.
The present invention is attached to housing that engine is connected with hydraulic pump and the method on the coupling shaft respectively through the torque sensor parts with prior art; Reduced the installing space of torque sensor, thereby making to be installed on the limited engineering machinery in space becomes possibility.Simultaneously, adopt interior circle of connection axle head cylindrical and engine flywheel installation counterbore and end face thereof to carry out installing and locating, make that installation is quick, convenient, need not any adjustment.Thereby both made and installed and used, safeguarded very convenient, guaranteed again that the pick-up unit working stability was reliable.
Because apparatus of the present invention have adopted above method, what made full use of existing engineering machinery engine and hydraulic pump is connected having living space of housing and coupling shaft, makes very compactness of structure to make random installation become possibility.
Simultaneously, because apparatus of the present invention had both realized being connected combining closely of housing with engine, possess the independence of torque detecting apparatus again, its manufacturing can independently realize.And can select for use different existing moments of torsion to pass the device technology according to different measuring accuracy requirement, manufacturing cost and reliability requirements.Thereby make in batches for commercialization, reduce cost and provide convenience.
Beneficial effect:
The defective that the present invention is directed to prior art provide a kind of simple in structure, volume is little, engineering machinery engine power that connection can conveniently be installed detects the autonomous device of measuring.This device both can be used for the real vehicle kinetic measurement of engineering machinery engine power, and the power signal that this device simultaneously capable of using again detects carries out hydraulic system load control.
Another object of the present invention provides and a kind ofly is used to realize that the real vehicle that will be attached to engineering machinery engine power based on the non-contact torque sensor of prior art detects the method for measuring.
The present invention will be integrated into respectively based on the non-contact torque sensor of prior art with engine and be connected with hydraulic pump on the housing that combines; Make this project mechanical engine power pick-up unit simultaneously and the coupling spindle that is connected with the hydraulic pump drive input shaft of engine power output mechanism, thereby make this device have simple in structure, compact advantage.
Engineering machinery engine power pick-up unit of the present invention is easy to manufacture, cost is lower.
Engineering machinery engine power pick-up unit disclosed by the invention can be widely used in moment of torsion and/or the rotating speed that transmits between detection and/or control hydraulic pump and engine, and the signal that it measured can be used for the test analysis and the real vehicle optimal control of the engineering machinery of variety of way.
Simultaneously, method disclosed by the invention can also be advantageously used in the transmission of power test and the control device of multiple machinery, as torque sensor is attached on the power input shaft of variator and/or torque converter, is used to detect the transferring power of vehicle.
The present invention provides simultaneously the non-contact torque sensor based on prior art is attached to the method that is connected the housing that combines and the coupling spindle that is connected with the hydraulic pump drive input shaft with the engine power output mechanism with engine with hydraulic pump respectively.Thereby make this device have advantage simple in structure, compact, that be easy to safeguard.
Just because of engaging with the effective of middle casing and middle coupling spindle; Thereby make this apparatus structure compact, take up room that little, maintaining is convenient, cost is lower, for realizing that hydropress machinery real vehicle real-time follow-up detects with monitoring a kind of feasible apparatus and method are provided.
Description of drawings
Fig. 1 is a kind of this device and engine, hydraulic pump scheme of installation;
Fig. 2 is the fundamental diagram of this contrive equipment;
Fig. 3 is an a kind of application example structural drawing of this device;
Fig. 4 is this device exemplary plot that has tach signal;
Fig. 5 illustrates another kind of application example figure according to the inventive method.
Label declaration: 1-hydraulic pump; 2-power pick-up unit of the present invention; 11-casing of hydraulic pump joint flange; 111-casing of hydraulic pump joint flange locating flange; The 12-hydraulic pump driveshaft; 21-power pick-up unit coupling housing; 211-connects shell; The 212-power supply receives secondary coil; The 213-spacer ring; 214-signal transmission line circle; 215-connects the shell locating flange; 216-wiring circuit box; 217-photoelectricity rotating speed detector; 22-power pick-up unit coupling shaft; 221-elasticity shaft joint; 222-power delivery primary coil; The 223-coupling shaft; 224-Torque sensor unit; The 225-circuit board; The 226-signal receiving coil; 227-coupling shaft locating flange; 228-rotating speed gear ring; The 31-flywheel shell of engine; The 32-engine flywheel; 321-engine flywheel dish; 322-engine flywheel gear ring.
Embodiment
Below will combine accompanying drawing and specific embodiment that the present invention is explained further details:
Embodiment 1:
Fig. 1 is that this device is connected synoptic diagram with the installation of engine, hydraulic pump.Among the figure bell housing of engine and casing of hydraulic pump joint flange respectively through casing of hydraulic pump joint flange locating flange be connected the two ends of shell locating flange axial location and be connected with power pick-up unit coupling housing; Well-known engine power output is to export through the engine flywheel dish from the bent axle of engine, and hydraulic pump is a driving power of being accepted engine by its driving shaft.Be connected with hydraulic pump driveshaft 12 with engine flywheel dish 321 respectively at Fig. 1 medium power pick-up unit coupling shaft two ends, in transmission of power, bear the twisting action of engine output torque, thereby cause the STRESS VARIATION or the torsion distortion of coupling shaft 223.In existing torque sensor technology, can convert this STRESS VARIATION or torsion distortion into detectable torque measurement through strain resistor, electric capacity, piezoelectricity, magnetoelasticity, corner phase differential etc.The right-hand member sending and receiving motivation of Fig. 1.
Fig. 2 is the fundamental diagram of this contrive equipment.When adopting different Torque sensor elements, in application example of the present invention, adopted and used the most extensive strain bridge as the sensitive element of measuring moment of torsion.The strain bridge that is bonded in the coupling spindle outside surface will produce an analog electrical signal when coupling spindle receives the torsion torque, this analog electrical signal contactlessly is sent on the connection shell through coil mutual inductance mode after amplification and conversion process.Simultaneously, the input power supply also is contactlessly to be transferred on the coupling spindle through coil mutual inductance mode, supplies power for strain bridge and signal processing circuit.Transmit signal and supply power through coil inductance transformer mode, existing explanation in patent CN93240174.0.
Fig. 3 shows a sectional view based on this device of the present invention.This device by a power pick-up unit coupling housing that has combined the wiring circuit box that two mutual inductors are connected with outer examining system and strain bridge that has combined two mutual inductors and an induction transmission torque, be no less than the power pick-up unit coupling shaft of a circuit board.
STRESS VARIATION or torsional deformation that the power pick-up unit coupling shaft of this device produces in the power transmission process are to convert the torque measurement amount into through strain bridge.Modulate by one or two circuit board on this power pick-up unit coupling shaft by being combined in for this torque measurement amount; Transmit through mutual inductance effect with the signal receiving coil that is combined in shell through the signal transmission line circle that is combined on this device coupling spindle through the signal after this circuit modulation, and supply power for the modulation circuit plate through mutual inductance effect through the power supply reception secondary coil that is combined on this device coupling spindle equally with the power delivery primary coil that is combined on the shell equally.On the excircle that connects shell, be combined with a wiring circuit box that comprises power supply access and signal output interface, power-switching circuit and signal modulation circuit and accomplish the measurement of different needs and the signal exchange of control purposes.
The above combination is meant through modes such as bonding, riveted joint, welding or cooperations and connects into an integral body with one or more parts are equipped.
On power pick-up unit coupling shaft 22, paste and survey the twisting strain sheet and form strain bridge, constitute the Torque sensor unit.Two ends are combined with on axle: the secondary coil of a responsible AC power input; One or more printed circuit board (PCB)s (being responsible for AC power rectification, signal amplification and modulation); The primary coil of a signal output.On housing 21, be combined with: a primary coil of being responsible for providing power supply; The secondary coil that signal receives; A circuit box that includes torque signal modulation, power source conversion and external interface.Like this, power supply is realized non-contact transmission through two inductive coils that are combined in respectively on housing and the coupling spindle; The torque signal that strain bridge produces on the coupling spindle is realized non-contact transmission through the inductive coil that two other is combined in respectively on housing and the coupling spindle.
Because above-mentioned moment of torsion detection technique has been mature technology, not at this detailed description.Fundamental purpose of the present invention is to provide a kind of torque detecting apparatus and the method that this mature technology is combined through the middle coupling spindle with the middle casing that connects flywheel shell of engine and hydraulic pump end, connection engine flywheel and hydraulic pump.Just because of engaging with the effective of middle casing and middle coupling spindle; Thereby make this apparatus structure compact, take up room that little, maintaining is convenient, cost is lower, for realizing that hydropress machinery real vehicle real-time follow-up detects with monitoring a kind of feasible apparatus and method are provided.
Fig. 4 shows an engineering machinery power pick-up unit that has the tach signal pick-up unit according to basic skills of the present invention.The photoelectricity rotating speed detector of tach signal pick-up unit also is arranged on above-mentioned power pick-up unit with the rotating speed gear ring and is connected on shell and the power pick-up unit coupling shaft.
Fig. 5 also shows the example that the existing sensor of a kind of direct usefulness is reequiped according to basic skills of the present invention.Be in this example adopted an improved sensor directly with special-purpose housing through inlaying be combined into.
In addition, the power pick-up unit according to basic skills of the present invention can also be integrated on the power input shaft of transmission for vehicle or torque converter.
The engine power that this engine power pick-up unit obtains (moment of torsion, rotating speed and power) signal can be used for the various controls and the monitoring of machine assembly.For example:
The housing two ends are connected with casing of hydraulic pump with flywheel shell of engine respectively, and adopt inside and outside circle to carry out installing and locating at two ends; The two ends of its coupling spindle are connected with the hydraulic pump drive input shaft with engine power output mechanism (flywheel) respectively, and adopt inside and outside circle and end face thereof to carry out installing and locating at the engine flywheel end, and are quick and easy for installation like this, need not adjustment.And, the housing of this device and coupling spindle be separate independent, non-contacting.
Housing is provided with the wiring circuit box, and the wiring circuit box comprises at least that power supply inserts with the external interface of signal output and circuit thereof, direct current and delivers stream power-switching circuit and detection signal modulation circuit.
The external interface definition that the power supply of wiring circuit box inserts and signal is exported can be any one among serial ports, CAN bus, LIN bus, the USB.
When this machine of engine did not have tach signal or its tach signal precision not to reach to require, its housing can combine a photoelectric sensor and induction fluted disc simultaneously respectively with coupling spindle, and the tach signal of power detections needs is provided.
Claims (9)
1. an engineering machinery engine dynamic detection method is characterized in that, connects the power input shaft of engine power output mechanism and follower through coupling spindle; The two ends of coupling housing join with the housing of flywheel shell of engine and follower respectively; On shaft coupling, be provided with the Torque sensor unit, electric energy required on the shaft coupling transmits with the mutual inductance mode through the coil that branch is located on shaft coupling and the coupling housing; On coupling housing, be provided with the terminal box that comprises power supply access and signal output interface, power-switching circuit and signal modulation circuit; The torque signal that the Torque sensor unit obtains is transferred in the treating apparatus that is provided with on the coupling housing through coil mutual inductance mode, thereby realizes that moment of torsion detects.
2. engineering machinery engine dynamic detection method according to claim 1 is characterized in that, the Torque sensor unit is the torque sensor based on line of tension, foil gauge, electric capacity, inductance, resistance, magnetoelasticity or magnetic resistance; Described follower is hydraulic pump, transmission for vehicle or torque converter.
3. engineering machinery engine dynamic detection method according to claim 1 and 2; It is characterized in that; Measure the rotating speed of engineering machinery engine through the photoelectricity speed detector; The gear ring of said photoelectricity speed detector is located on the above-mentioned coupling spindle, and the sensor of said photoelectricity speed detector is located on the coupling housing.
4. an engineering machinery engine power pick-up unit is characterized in that, coupling spindle connects the power input shaft of engine power output mechanism and follower; The two ends of coupling housing join with flywheel shell of engine and follower housing respectively; On coupling spindle, be provided with the Torque sensor unit, coupling spindle is provided with torque signal transmission primary coil and power supply receives secondary coil; On coupling housing, be provided with the power delivery primary coil, be used to obtain the secondary coil of torque signal and comprise the power supply access and the terminal box of signal output interface, power-switching circuit and signal modulation circuit; Torque signal transmission primary coil and torque signal receive secondary coil and carry out EM coupling; Power delivery primary coil and power supply receive secondary coil and carry out EM coupling.
5. engineering machinery engine power pick-up unit according to claim 4; It is characterized in that; Also comprise a photoelectricity speed detector, the gear ring of said photoelectricity speed detector is located on the said coupling spindle, and the sensor of said photoelectricity speed detector is located on the coupling housing.
6. engineering machinery engine power pick-up unit according to claim 4 is characterized in that terminal box is installed on the coupling housing, and said power supply access and signal output interface adopt any one among CAN bus, serial ports, LIN bus or the USB.
7. engineering machinery engine power pick-up unit according to claim 4; It is characterized in that; The Torque sensor unit is the torque sensor based on foil gauge, electric capacity, inductance, piezoelectricity, magnetoelasticity or magnetic resistance, and described follower is hydraulic pump, transmission for vehicle or torque converter.
8. engineering machinery engine power pick-up unit according to claim 4 is characterized in that, described Torque sensor unit is for adopting strain bridge as the sensitive element of measuring moment of torsion.
9. according to each described engineering machinery engine power pick-up unit of claim 4-8, it is characterized in that power supply receives out-secondary and is connected to rectification circuit and filtering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010106077916A CN102141453B (en) | 2010-12-28 | 2010-12-28 | Power detection method of engine of construction machinery and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106077916A CN102141453B (en) | 2010-12-28 | 2010-12-28 | Power detection method of engine of construction machinery and device thereof |
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| CN102141453A CN102141453A (en) | 2011-08-03 |
| CN102141453B true CN102141453B (en) | 2012-06-27 |
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| CN105571994B (en) * | 2015-12-11 | 2018-02-09 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of power drive system lubricating oil metal fillings parameter detection method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1975213A (en) * | 2005-12-02 | 2007-06-06 | 通用汽车环球科技运作公司 | Torque monitoring system and method of monitoring engine torque |
| CN101046428A (en) * | 2007-04-30 | 2007-10-03 | 中国航空动力机械研究所 | Engine rotation shaft torquemeter |
| CN101382461A (en) * | 2008-08-25 | 2009-03-11 | 北京新宇航世纪科技有限公司 | Torque sensor and measuring system |
| CN201917424U (en) * | 2010-12-28 | 2011-08-03 | 湖南山河智能机械股份有限公司 | Engineering machinery engine power detecting device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7201044B1 (en) * | 2005-09-27 | 2007-04-10 | Honeywell International, Inc. | Torque sensor integrated with engine components |
| US8001848B2 (en) * | 2007-12-18 | 2011-08-23 | Deere & Company | Torque measurement method and apparatus |
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- 2010-12-28 CN CN2010106077916A patent/CN102141453B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1975213A (en) * | 2005-12-02 | 2007-06-06 | 通用汽车环球科技运作公司 | Torque monitoring system and method of monitoring engine torque |
| CN101046428A (en) * | 2007-04-30 | 2007-10-03 | 中国航空动力机械研究所 | Engine rotation shaft torquemeter |
| CN101382461A (en) * | 2008-08-25 | 2009-03-11 | 北京新宇航世纪科技有限公司 | Torque sensor and measuring system |
| CN201917424U (en) * | 2010-12-28 | 2011-08-03 | 湖南山河智能机械股份有限公司 | Engineering machinery engine power detecting device |
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